Patents
Sitemap › H04 - Electric communication technique › H04S - Stereophonic systems › H04S 3 - Systems employing more than two channels, e.g. quadraphonic
Patents for H04S 3 - Systems employing more than two channels, e.g. quadraphonic (4,597)
01/1999
01/05/1999US5857026 For a three-dimensional positioning-mapping stereo sound reproduction system
12/1998
12/23/1998WO1998058523A1 Reproduction of spatialised audio
12/23/1998WO1998058522A2 Sound reproduction system
12/23/1998EP0885545A1 Sound reproducing array processor system
12/15/1998US5850456 Apparatus for encoding multiple digital information signals
12/15/1998US5850455 Discrete dynamic positioning of audio signals in a 360° environment
12/03/1998WO1998042162A3 Multidirectional audio decoding
12/02/1998CN1200645A Method and apparatus for error masking in multi-channel audio signals
12/01/1998US5844993 Surround signal processing apparatus
12/01/1998US5844816 Angle detection apparatus and audio reproduction apparatus using it
11/1998
11/26/1998WO1998053641A1 Multi-channel speaker systems integrated into storage-television stand cabinet configuration
11/25/1998EP0880301A2 Full sound enhancement using multi-input sound signals
11/25/1998EP0880246A2 Compressed code decoding device and audio decoding device
11/25/1998EP0517848B1 Sound mixing device
11/24/1998US5841993 Surround sound system for personal computer for interfacing surround sound with personal computer
11/24/1998US5841879 Virtually positioned head mounted surround sound system
11/19/1998CA2236342A1 Full sound enhancement using multi-input sound signals
11/10/1998US5835093 Audio equipment and method of displaying operation thereof
11/04/1998EP0875126A1 Surround sound processor with improved control voltage generator
10/1998
10/29/1998WO1998033356A3 Method and apparatus for electronically embedding directional cues in two channels of sound
10/28/1998EP0873667A1 Sound system
10/21/1998EP0872154A1 An acoustical audio system for producing three dimensional sound image
10/06/1998US5818943 Transmission and reception of a first and a second main signal component
10/06/1998US5818941 Configurable cinema sound system
10/06/1998US5818418 For processing an audio signal/video signal for video signal receiver
10/01/1998WO1998043466A1 Audiochannel mixing
09/1998
09/30/1998CN1194737A Encoding apparatus for encoding a plurality of information signals
09/30/1998CN1194533A AV amplifier
09/24/1998WO1998042162A2 Multidirectional audio decoding
09/23/1998EP0866638A2 Audiovisual amplifier
09/22/1998US5812675 Sound reproducing array processor system
09/22/1998US5812674 Method to simulate the acoustical quality of a room and associated audio-digital processor
09/16/1998EP0865225A2 Terminal station for a transmission system
09/16/1998EP0864146A1 Multi-channel predictive subband coder using psychoacoustic adaptive bit allocation
09/01/1998US5802181 Theater sound system with upper surround channels
09/01/1998US5802180 Method and apparatus for efficient presentation of high-quality three-dimensional audio including ambient effects
08/1998
08/25/1998US5798818 Method for reproducing sound from an audiovisual production
08/20/1998DE19706137A1 Holophony process for generating true stereoscopic sound
08/18/1998US5796844 Multichannel active matrix sound reproduction with maximum lateral separation
08/18/1998US5796843 Video signal and audio signal reproducing apparatus
08/13/1998WO1998035495A2 Multichannel television sound stereo and surround sound encoder
08/12/1998EP0858243A2 Surround sound channel encoding and decoding
08/12/1998EP0857378A1 Ultrasonic sound system and method for producing virtual sound
08/04/1998US5790500 Apparatus for recording/reproducing converted four-channel audio signals
07/1998
07/30/1998WO1998033356A2 Method and apparatus for electronically embedding directional cues in two channels of sound
07/30/1998WO1998033172A1 Synchronized signal compression and decompression for audio distribution system with individually-selectable channels
07/29/1998CN1189081A Multi-channel audio enhancement system for use in recording and playback and method for providing same
07/22/1998EP0854660A2 Sound processing circuit
07/22/1998EP0853842A1 Encoding of a plurality of information signals
07/22/1998CN1188572A N-channel transmission, compatible with 2-channel transmission and 1-channel transmission
07/22/1998CN1188571A 7-channel transmission, compatible with 5-channel transmission and 2-channel transmission
07/21/1998US5784467 Method and apparatus for reproducing three-dimensional virtual space sound
07/09/1998WO1998030064A1 Processing audio signals
06/1998
06/30/1998US5774864 Composite dynamic-crosstalk/phantom-center decoder for MPEG-2 multichannel audio
06/30/1998US5774559 Method and apparatus for determining perceived roughness of powertrain sounds
06/30/1998US5774016 Method of providing audio signals through an amplifier system
06/30/1998CA2117829C Perceptual coding of audio-signals
06/23/1998US5771295 5-2-5 matrix system
06/23/1998US5771294 Acoustic image localization apparatus for distributing tone color groups throughout sound field
06/23/1998US5771041 System for producing directional sound in computer based virtual environment
06/17/1998CN1038805C Hi-fi sound-system voice-box without frequency divider
06/16/1998US5768394 Surround audio signal reproducing apparatus having a sub-woofer signal mixing function
06/10/1998EP0846405A1 Process for reducing redundancy during the coding of multichannel signals and device for decoding redundancy-reduced multichannel signals
06/09/1998US5764777 Four dimensional acoustical audio system
06/02/1998US5761537 Method and apparatus for integrating three dimensional sound into a computer system having a stereo audio circuit
06/02/1998US5761315 Audio video reproduction method
06/02/1998US5761314 Audio reproducing apparatus and headphone
05/1998
05/28/1998DE19745392A1 Sound reproduction apparatus
05/28/1998DE19720217A1 Automatic equalising arrangement for multi-channel audio system
05/26/1998US5757931 Signal processing apparatus and acoustic reproducing apparatus
05/26/1998US5757927 Surround sound apparatus
05/19/1998US5754874 Digital signal processor with selective sound operation
05/14/1998WO1998020709A1 Multi-channel audio enhancement system for use in recording and playback and methods for providing same
05/14/1998WO1998020708A1 Multichannel active matrix encoder and decoder with maximum lateral separation
05/14/1998DE19645867A1 Multiple channel sound transmission method
05/05/1998US5748746 Ceiling speaker and signal source
04/1998
04/28/1998US5745584 Sound bubble structures for sound reproducing arrays
04/22/1998CN1179870A Method and device for encoding, transferring and decoding non-PCM bitstream between digital versatile disc device and multi-channel reproduction apparatus
04/21/1998US5742689 Method and device for processing a multichannel signal for use with a headphone
04/15/1998EP0836365A2 System for processing audio surround signal
04/15/1998CN1179074A Apparatus for reproducing multi channel voice using two speaker and its method
04/14/1998US5740253 Sterophonic sound field expansion device
04/07/1998US5737427 Surround sound processor unit
04/01/1998EP0832519A1 Encoding apparatus for encoding a plurality of information signals
03/1998
03/31/1998US5734724 Audio communication control unit
03/26/1998WO1998012896A1 Transaural stereo device
03/26/1998WO1998012827A1 Multichannel spectral mapping audio apparatus and method
03/25/1998EP0750811B1 Process for coding a plurality of audio signals
03/25/1998CN1177433A In-home theater surround sound speaker system
03/24/1998US5732142 Musical sound reproduction controller with two-stage adjustment of tone
03/17/1998US5729613 Reverberators for use in wide band assisted reverberation systems
03/11/1998EP0828405A2 System for processing audio surround signal
03/10/1998US5727075 Multipoint communication apparatus with reduced number of audio decoders
03/10/1998US5727068 Matrix decoding method and apparatus
03/10/1998US5727067 Sound field control device
03/10/1998US5727066 Sound Reproduction systems
02/1998
02/19/1998WO1998007299A1 Recording and play-back two-channel system for providing a holophonic reproduction of sounds
02/12/1998WO1998006239A1 Setup in home theatre or other sound reproduction equipment
02/10/1998US5717767 Angle detection apparatus and audio reproduction apparatus using it
02/10/1998US5717766 Stereophonic sound reproduction apparatus using a plurality of loudspeakers in each channel
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